Lilypad sync problem

Hello there
I'm doing my project for my final year and i have a problem uploading the code.I get this error: avrdude: stk500_getsync(): not in sync: resp=0x00
I'm using windows 8 and did the "Disable Driver Signature Enforcement" thing,unistalled the driver and then installed it automatically when I plug in the USB to Serial TTL Cable
I'm sure the chip i use is the 328 and not the 168 and I also checked if i had the com wrong,which i didn't.
Could someone help me resolve the problem?

Thanks for your time

P.S. I pressed shift while uploading and it gives me this avrdude: usbdev_open(): did not find any USB device "usb ,still having tha same problem i guess